I have been tracking battery life and how I am using it for a couple of weeks now, trying to correlate use, settings, or whatever to burn. I have not come up with much, but I have noticed one concern - battery drop is much faster once the watch is below 40%. For example, it was at 35% this morning and 6 hours later, it is at 25%. That's on track for 40%per day with no interesting just smart watch and steps in effect. The drop from 100% to 35% took 2.5 days and included 3 hours of GPS biking activity - which were about 11% each - making the non-GPS drain about 17% per day.
Has anyone else tracked and noticed a faster drain when the watch is already under 40%?